7-2 CHAPTER 7: PLACING AND RECEIVING CALLSPlacing Calls AutomaticallyIf you are using standard communications software, selectthe 3ComImpact IQ ISDN modem. If the 3ComImpact IQISDN modem is not listed, select a Hayes®-compatiblemodem configuration and dial out through the 3C882 ISDNmodem. If you are using a Hayes-compatible modemconfiguration, you may have to manually configure settingssuch as baud rate. Refer to your communications softwaredocumentation for more details.Placing Calls ManuallyYou can place calls manually using AT commands. Yourcommunications software must be in terminal emulationmode.Follow these steps to use AT commands:In most situations, an initialization string is not necessarywith the 3C882 ISDN modem. If an initialization string isrequired by the communications software or server, use theHayes default initialization string.1 Launch your communications software.2 Be sure the 3C882 ISDN modem is in command mode(sometimes called local mode or terminal mode) so that itinterprets your commands.When your computer is powered on, the 3C882 ISDN modemautomatically starts in command mode. If you have recentlyused the 3C882 ISDN modem to make a call and have not yetdisconnected, type +++ to switch to command mode.3 Type:AT D number>The 3C882 ISDN modem recognizes the AT command ATD todial a digital ISDN data call. Correct examples of outgoing
